Lock tack



lc. v. LIMERICK.

Loc-K T AcK.

AEPLICATION FILED DEC.I5, 1920.

1,412, 1 86. Patented Apri 11, 1922.

Xz/ ze M 4Z a Bharles Y. Lmerlk M v www@ lm@ I lrronmf UNITE- STATES CHARLES 'V'. LIMERICK, 0F HAMILTON, OHIO.

LOCK TACK.'

Specification of Letters Patent.

Application ledDecember 15, 1920. Serial No. 431,000.

T aZZ wk-om t may concern:

Be it known that I, CHARLES V. LIMERIOK, a citizen of the United States, residingpat Hamilton, in the county of Butler and State of Ohio, have invented certain new and u seful Improvements in Lock Tacks, of which the following is a specification.

This invention relates to improvementsin tacks. The primary object of the invention is the provision of a tack stamped from a single piece of sheet material.

A further object of the invention is the provision of a tack having a relatively long fastening prong, and auxiliary prongs of shorter length, disposed about said central prong, and spaced therefrom.

A further object of the invention 1s the provision of a tack which is stampedrfrom .a single sheet of material, and including a main fastening'element, and auxiliary fast ening elements, for locking and holding several-objects, which might not overlie each other.

A further object of the invention, is the provision of a locking tack of the above described character, which is simple in construction, economical in manufacture, and one which can be used to serve a variety of useful purposes.

Other advantages of the improved lock tack will be apparent during the course of the following detailed description.

4 In the accompanying drawing, forming a part of this specification, and in which like reference characters designate like parts throughout the saine,

Figure l is a 'perspective view of the improved lock tack, showing'the same proings.

vided with a plurality of arms.. o

Figure 2 isa bottomplan view of the type of lock tack, shown in Figurev 1 of the draw- Figureisa cross sectional vie-w` of thel improved lock tack.-

Figure 4 is a cross sectional view through a locking prong of the improved lock tack, and taken on the line 4 4 of Figure 3.'

Figure 5 is a plan view of a modified form o-f lock tack.

Figure 6 is a side elevation vof the modified form shown in Figure 5.

Figure 7 is a cross sectional view showing a further modified type of lock tack.

Referring to the drawings in detailwhere in for the purpose of illustration, is shown a preferred embodiment of my invention, the

, numeral 10, designates a preferred form of lock tack, which is preferably formed of a single sheet of metal, and comprises the arms 1l and 12, in longitudinal alignment; andthe arms 13 and 14 1n longitudinal alignment, the arms 11, 12, 13 and 14, all lying in the same plane and forming an integral structure. The arms 13 and 14, which are in longitudinal alignment, have the sections l5 and 16 struck respectively therefrom. Thesections 15 and 16 are of equal length, and are so struck from their respective arms that the apertures 17, remaining in the arms 13 and 14 after the sections 15 and 16 have been bent to their desired positions, terminate short of the ends18 of the arms 13 and 14, in order to permit of sl'iiicient rigidity of the arms.

The arms 1l, 12, 13 and 14, radiate from a common center 20, and it is at this common center 20, that thesections 15 and 16 remain integralI with the structure 10. The sections 15 and 16 are first. bent downwardly, and then struck inwardly, asfat 21, and then brought into abutting relation continuing throughout their lengths to provide a relatively long prong 22. The sections 15 and 6, may or course, be soldered,'or welded together, to provide a more rigid or integral structure. It is preferred, that the sections 15 and 16 be pointed, as they are struck from the arms 13 and 14, and thel points provided with the bevelled surfaces 23, to provide a better structure. The lateral edges of the prong 22, are likewise provided with bevelled surfaces 24, to permit of more-ready insertion of the proiig22 into an object. The ends 18 of the arms 13 and 14; and the ends 25 of the arms 1l and 12, are provided with tapered downturned vprongs 26, relatively shorter in length than the long prong 22.

The form of my invention shown in F igures 1 and 2, of course, may be provided with any number of arms, to suit a particuthe purpose of the arms, such as'll and 12 to fasten diferentobjects or different sections of gether. This lock tack vantage, in building construction, and especially in .roofing a' structure where the meeting ends of several sections of roofing could be fastenedv to the roof, by the different arms: of the tack 10.

In the modified form as shown in Figures Patented Apr. 11, 1922.

ioo

arms 31 and 32, in longitudinal alignment. Each of the arms 31 and 32, have a section of material 33, struck therefrom, and bent inwardly 'and downwardly similar to .the sections-as hereinbefore described for Figure l.v The ends 34' of the arms 31 and 32, are provided with the downturned arms 35, relatively shorter in length than the prong 36, as provided by the sections 33. This type of lock tack, can be used to advantage, where it is merely desired to secure two sections of material or objects together.

In the form shown in Figure 7 a single section of material 40 is struck from an arm 41, of a'tackstructure 42, and first bent inJ -wardly as at 43, and then bent downwardly to.provide a prong, in itself. The end' 44 of the prong 40 is pointed, to permit of its ready' insertion into an object. The section of metal taken from the arm of this type of lock tack, is completely severed fromthe body of the tack, it being deemed super- Otherwise the structure of this modified 4form of lock tack is the same as above set forth for Figure 1 of the drawings, the ends of the'arms 41 and 45, being provided with the downturnedprongs 46, relatively, shorter in llength than the prong 40.

.It can be seen from the` foregoing description, that alock tack has been perfected, formed of a single sheet of material; in which'the'prongs of said tack are of sufficient rigidity to effectively function as a tack, in which the prongs are completely einbedded'in an object, and are not adapted to be turned aside or in any way mutilated.

It is to be understood that the form of myinvention herewith shown and described,

-is -to be taken as a preferred example of the a same, and that various changes in the shape, size and arrangement of parts, may be resorted to, without departing from the spirit of the invention, or the scope of the subjoined claims.

I claim:-

1. A tack comprising a body portion provided with sections struck therefrom, said sections being bent centrally of said body portions to lie in abutting relation to form a relatively long fastening prong, and smaller prongs formed on the longitudinal ends of said body portion.

2. A tack, comprising a body portion, pointed sections struck therefrom upon each side of the transverse center thereof, said pointed sections being bent inwardly and downwardly to lie in abutting relation, to provide a relatively long fastening prong, the lateral edges of said prong being bevelled. l

3. A tack, comprising a body portion, pointed sectionsstruck therefrom upon each side of the transverse center thereof, said pointed sections being bent inwardly and downwardly to lie in abutting relation, to provide a relatively long fastening prong, the lateral edges of said prong being bevelled, and small end pointed prongs upon the longitudinal ends of said body portion.

4. A tack, comprising a body portion, formed of a plurality of arms radiating fromva common center, certain of said arms having pointed sections struck therefrom and fastened to said body portion at its common center, said sections bent downwardly to lie in abutting relation, to provide a fastening prong for securing the edges of arti cles that do not overlap.

CHARLES V. LIMERICK. 

